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      Question

      If in each number, all the digits are written in

      descending order, last digit of how many numbers thus formed will be a prime number? These questions are based on the following set of numbers: 642 875 446 355 748
      A 1 Correct Answer Incorrect Answer
      B 2 Correct Answer Incorrect Answer
      C 3 Correct Answer Incorrect Answer
      D 4 Correct Answer Incorrect Answer
      E 5 Correct Answer Incorrect Answer

      Solution

      642 875 446 355 748 642 875 644 553 874

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